{"id":"CVE-2026-73974","title":"linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API integrations, and Linuxfabrik Monitoring Plugins uses its shared testing helper across check plugins","summary":"linuxfabrik-lib provides Python modules for database access, caching, shell execution, and API integrations, and Linuxfabrik Monitoring Plugins uses its shared testing helper across check plugins. Prior to linuxfabrik-lib 6.1.0 and Linux…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22","CWE-269"],"vendor":"linuxfabrik-lib","product":"linuxfabrik-lib","affected":["linuxfabrik-lib < 6.1.0"],"patched":["linuxfabrik-lib 6.1.0"],"published":"2026-08-18","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:13:25.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73974","references":[{"url":"https://github.com/Linuxfabrik/lib/commit/d665042c55fae83a295ebc0023e8b77f6c473a28","label":"security-advisories@github.com"},{"url":"https://github.com/Linuxfabrik/lib/releases/tag/v6.1.0","label":"security-advisories@github.com"},{"url":"https://github.com/Linuxfabrik/monitoring-plugins/commit/f6680a9e4b39569f318feefdb2f51e5d18c7dad5","label":"security-advisories@github.com"},{"url":"https://github.com/Linuxfabrik/monitoring-plugins/releases/tag/v7.0.0","label":"security-advisories@github.com"},{"url":"https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-rh9c-rqvg-f7pr","label":"security-advisories@github.com"},{"url":"https://github.com/Linuxfabrik/monitoring-plugins/security/advisories/GHSA-rh9c-rqvg-f7pr","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-rh9c-rqvg-f7pr"}],"tags":["nvd","ghsa","pip"],"epss":0.002,"epssPercentile":0.10216,"aliases":["GHSA-rh9c-rqvg-f7pr"],"ecosystem":"pip","ingestedAt":"2026-08-18T21:22:59.401Z","slug":"CVE-2026-73974","body":"## Overview\n\nlinuxfabrik-lib provides Python modules for database access, caching, shell execution, and API integrations, and Linuxfabrik Monitoring Plugins uses its shared testing helper across check plugins. Prior to linuxfabrik-lib 6.1.0 and Linuxfabrik Monitoring Plugins 7.0.0, lib.lftest.test() treated the first or second element of a --test CSV argument as a filesystem path and returned the file contents as simulated standard output or standard error without path confinement. The hidden but production-accessible --test argument was accepted by sudo-authorized plugins, so an attacker controlling the nagios or icinga account could use check-plugins/deb-updates/deb-updates with its default QUERY=1 to disclose every line of a root-readable file. Approximately 22 other plugins exposed filtered content or a root file existence and readability oracle through the same helper, while check-plugins/network-bonding/network-bonding and check-plugins/openstack-swift-stat/openstack-swift-stat had direct read paths that bypassed the helper. The library fix confines fixture reads to the invoking plugin's unit-test directory and refuses unsafe anchors, and the plugin fix routes the two bypasses through that helper. These issues are fixed in linuxfabrik-lib 6.1.0 and Linuxfabrik Monitoring Plugins 7.0.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-73974)\n\nAffected packages:\n\n- `linuxfabrik-lib < 6.1.0`\n\nPatched in:\n\n- `linuxfabrik-lib 6.1.0`\n\nSource: https://github.com/advisories/GHSA-rh9c-rqvg-f7pr","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}